Home / 387,288.18-534,447.02-215,201.69

Finding the Fourth Proportional to 387,288.18, 534,447.02 and 215,201.69

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Solution

The fourth proportional to 387,288.18, 534,447.02 and 215,201.69 is: 296,972.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,288.18 : 534,447.02 = 215,201.69 : x
  2. Step 2: Convert to fraction form
    387,288.18/534,447.02 = 215,201.69/x
  3. Step 3: Cross multiply
    387,288.18x = 534,447.02 × 215,201.69
  4. Step 4: Simplify right side
    387,288.18x = 115,013,900,982.40
  5. Step 5: Solve for x
    x = 115,013,900,982.40/387,288.18
  6. Step 6: Final answer
    x = 296,972.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.